/Engine/Source/Runtime/GeometryCore/Public/DynamicMeshEditor.h
Rescale UVs for the whole mesh, for the given UV attribute layer
void RescaleAttributeUVs ( float UVScale, bool bWorldSpace, int UVLayerIndex, [TOptional](API\Runtime\Core\IO\TOptional)< [FTransformSRT3d](API\Runtime\GeometryCore\FTransformSRT3d) > ToWorld )